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Polycarbonate as well as preparation method and application thereof

A polycarbonate, selected technology, applied in the field of optical materials, can solve the problems of low internal stress, low Tg, and high refractive index, and achieve the effects of light weight, low glass transition temperature, and high toughness

Active Publication Date: 2022-07-05
HUAWEI TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In view of this, the embodiment of the present application provides a polycarbonate and its preparation method and application to solve the problem that the existing polycarbonate materials cannot take into account high refractive index, low internal stress, and appropriately low Tg to a certain extent

Method used

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  • Polycarbonate as well as preparation method and application thereof
  • Polycarbonate as well as preparation method and application thereof
  • Polycarbonate as well as preparation method and application thereof

Examples

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preparation example Construction

[0113] Correspondingly, the embodiments of the present application also provide a method for preparing the above polycarbonate. Specifically, the preparation method of polycarbonate comprises the following steps:

[0114] The raw material comprising the dihydroxy monomer represented by the formula (i) and the carbonic acid diester is prepared by melt polymerization to obtain a polycarbonate, and the polycarbonate comprises the structural unit represented by the formula (I):

[0115]

[0116] In formula (I) and formula (i), each occurrence of X is independently selected from oxygen atom, sulfur atom, sulfone group or sulfoxide group; Ar 1 , Ar 2 Each occurrence is independently selected from The position marked with * represents the connection position with formula (I) and formula (i);

[0117] where R 1 , R 2 , R 3 , R 4 , R 5 Each occurrence is independently selected from a hydrogen atom, a halogen atom, a hydroxyl group, a thiol group, a cyano group, an amino gro...

Embodiment 1

[0171] (1) Preparation of monomer BOF for synthesizing polycarbonate:

[0172] The reaction equation involved in synthesizing this BOF monomer is:

[0173]

[0174] 9-Fluorenone (20g, 0.11mol), raw material A-1 (ie, 4-phenoxyphenol) (82.7g, 0.44mol), catalyst 3-mercaptopropionic acid (1.2g) were successively added to a 250mL there-necked flask , 0.011mol), slowly heated to 95°C, added zinc chloride (15.3g, 0.11mol), reacted for 12h; then added 80mL of water to the obtained reaction solution, stirred for 10min, and extracted twice with 150mL of ethyl acetate , the organic phases were combined, the organic phase was dried, concentrated and purified to obtain 42.75 g of a white solid with a yield of 72%. The structure of the white solid was found to conform to the aforementioned formula (C) through characterization, and was referred to as compound C-1. Among them, the characterization data of the nuclear magnetic resonance image of compound C-1 are: 1 H NMR (300MHz, CDCl 3...

Embodiment 2

[0183] Preparation of Polycarbonate - Copolymerization of BOF and BPEF

[0184] The difference between the preparation process of this polycarbonate and Example 1 is that 1 eq of BOF monomer in Example 1 is replaced with 0.5 eq of BOF monomer and 0.5 eq of 9,9-bis[4-(2-hydroxyethyl) oxy)phenyl]fluorene (BPEF, structure shown below).

[0185] Wherein, the reaction equation involved in the polycarbonate of Preparation Example 2 is:

[0186]

[0187] The polycarbonate prepared in Example 2 is represented by the code P2. The polycarbonate P2 had a number average molecular weight Mn of 24 kg / mol and a PDI of 1.78.

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Abstract

The polycarbonate provided by the embodiment of the invention comprises a structural unit as shown in a formula (I): in the formula (I), X is independently selected from an oxygen atom, a sulfur atom, a sulfonyl group or a sulfoxide group when appearing each time; each occurrence of Ar1, Ar2, a position independently selected from or * markers represents a connection position; r1, R2, R3, R4 and R5 are independently selected from a hydrogen atom, a halogen atom, a hydroxyl group, a thiol group, a cyano group, an amino group, an ester group, an alkyl group, an alkoxy group, a naphthenic base, an alkenyl group, an aryl group, an aryloxy group or an atom or an atomic group capable of replacing the above groups, and any adjacent substituent groups in R1-R5 can be connected to form a cyclic structure; each occurrence of a, b and c is independently selected from an integer between 1 and 4, and each occurrence of d and e is independently selected from an integer between 1 and 3. The polycarbonate has the advantages of high refractive index, proper Tg and low internal stress. The embodiment of the invention also provides a preparation method and application of the polycarbonate.

Description

technical field [0001] The embodiments of the present application relate to the technical field of optical materials, and in particular, to a polycarbonate and a preparation method and application thereof. Background technique [0002] Polycarbonate (PC) material is widely used in the manufacture of optical products such as optical lenses and optical films due to its advantages of light weight, impact resistance, and easy processing and molding. With the continuous pursuit of high optical performance of optical products, the demand for PC materials with high refractive index is particularly urgent. However, while the refractive index of some existing polycarbonate materials is increased, it is often accompanied by phenomena such as excessive glass transition temperature (Tg) or excessive internal stress, which leads to greater difficulty in injection molding and imaging of the resulting optical products. less effective, etc. Therefore, it is necessary to develop a new PC m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/30
CPCC08G64/305
Inventor 王公应王庆印邹海良陈辰邹胜孙腾李晨
Owner HUAWEI TECH CO LTD